I updated my old world since 0.9.0 to 1.18 and got to 0 level to look on new caves generation
I found out what most of bedrock blocks on 0-5 levels haven't replaced with deepslate and stayed as they was.
Steps to Reproduce:
- Download and open the attached world
- Dig down to Y=0
Some of the bedrock hasn't been replaced with deepslate.
All bedrock should be replaced with deepslate.